Basecamp style domain/stats switching

37Signals implemented OpenID logins across all of their products recently, which allowed users with access to multiple Basecamp accounts to select which account they’d like to view - this was done via a handy drop-down at the top of the page.

Mint users with packages installed on multiple domains would love this functionality I’m sure. I have only a handful of Mint installs, but having a ‘quick-domain-switch’ at the top of the page, and OpenID logging in would be great.